shower trap waste to solvent weld

[pjo123]

Hi all

I'm using 40mm solvent weld for my shower waste, but all the traps I've seen are pushfit (well compression).

I've purchased one trap and the 40mm pipe fits very loosely into it.

Tightening the compression nut, does tighten the pipe in that I don't think it will leak, but as it's only gripping on the end of the shower trap, I want to check whether this is suitable or I should be looking for another way please?

My biggest concern is that while it may not leak, as there's a good 1mm+ gap all around the 40mm pipe, the water from the shower will constantly be chucked between the pipe and trap into the washer.

Hope that makes sense, will try and show you what I mean with a completely out of scale drawing.

Imagine I've installed the waste, tightened the nut and we've shrunk ourselves down and we're sitting inside the trap, looking out at the waste

40mm waste is the big black circle.

The outside of the trap is shown by the outer black circle.

But there is a gap between them. While this may be leak tight via the rubber washer at the edge of the trap, water is still able to get down there as shown by the blue circle.

Am I worrying unnecessarily (will be under the floor)

many thanks

 

[John506]

What colour is the pipe you are using? Black or white?

 

[kirkgas]

use a mcalpine multifit trap, they dont leak

 

[pjo123]

What colour is the pipe you are using? Black or white?

Black

http://www.screwfix.com/p/floplast-solvent-weld-40mm-waste-pipe-black-3m-x-10/89702

 

[gasafengineer]

You should be fine , although the pipe fits loose into the trap it is the washer that gets compressed between pipe & trap outlet , water will always sit between inner face of washer & trap outlet..